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Updated: Mar 20, 2026
A Multimodal Imaging Framework to Advance Phenotyping of Living Label-free Breast Cancer Cells
Published on: August 22, 2025
Raman microspectroscopy for probing the impact of a dietary antioxidant on human breast cancer cells
P S C Medeiros1, A L M Batista de Carvalho, C Ruano
1Química-Física Molecular, Univ. Coimbra, 3004-535 Coimbra, Portugal. pmc@ci.uc.pt.
Abstract:
Breast cancer is the second most common type of cancer worldwide and the most frequent among women, being the fifth cause of death from neoplastic disease. Since this is an oxidative-stress related neoplasia, it is largely preventable. A dietary isoflavone abundant in soybean - daidzein - is currently being investigated owing to its chemopreventive and/or chemotherapeutic properties towards the human MDA-MB-231 (metastatic, estrogen-unresponsive) and MCF-7 (estrogen-responsive) breast cancer cell lines. Biological assays for evaluation of antitumour and anti-invasive activities were combined with state-of-the-art vibrational microspectroscopy techniques. At 50 and 100 μM concentrations and 48 h incubation time, daidzein was found to induce a marked decrease in cell viability (ca. 50%) for MDA-MB-231 and MCF-7 cells (respectively ca. 50% and 42%) and 40% inhibition of cell migration. MicroRaman analysis of fixed cells upon exposure to this isoflavone unveiled its metabolic impact on both cell lines. Multivariate data analysis (unsupervised PCA) led to a clear discrimination between the control and DAID-exposed cells, with distinctive effects on their biochemical profile, particularly regarding DNA, lipids and protein components, in a cell-dependent way. This is the first reported study on the impact of dietary antioxidants on cancer cells by microRaman techniques.
Insights
Daidzein, a soybean isoflavone, shows potential as a dietary antioxidant for breast cancer prevention. This study reveals its ability to reduce cancer cell viability and migration, impacting cellular metabolism.
Area of Science:
- Biochemistry
- Oncology
- Spectroscopy
Background:
- Breast cancer is a leading cause of death, often linked to oxidative stress.
- Daidzein, a soy isoflavone, is being studied for its cancer-fighting properties.
- Investigating dietary compounds for breast cancer chemoprevention is crucial.
Purpose of the Study:
- To evaluate the chemopreventive and chemotherapeutic effects of daidzein on human breast cancer cell lines.
- To analyze the metabolic impact of daidzein using advanced micro-Raman spectroscopy.
Main Methods:
- Cell viability and migration assays were performed on MDA-MB-231 and MCF-7 breast cancer cells.
- Micro-Raman spectroscopy combined with multivariate data analysis (PCA) was used to assess cellular biochemical changes.
- Cells were exposed to daidzein at 50 and 100 μM concentrations for 48 hours.
Main Results:
- Daidzein significantly decreased cell viability in both cell lines (approx. 50% for MDA-MB-231, 42% for MCF-7).
- Cell migration was inhibited by 40% upon daidzein exposure.
- Micro-Raman analysis revealed daidzein's impact on DNA, lipid, and protein profiles, differing between cell lines.
Conclusions:
- Daidzein exhibits significant anti-cancer activity against both estrogen-responsive and unresponsive breast cancer cells.
- Micro-Raman spectroscopy is a powerful tool for understanding the metabolic effects of dietary antioxidants on cancer cells.
- Daidzein represents a promising dietary intervention for breast cancer chemoprevention.
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